package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;

@Service
public class  EmployeeServiceImpl implements EmployeeService {

    private static final Logger log = LoggerFactory.getLogger(EmployeeServiceImpl.class);
    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 对前端传来的明文密码进行md5加密处理
        password  = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 员工登录（支持管理员明文密码验证）
     *
     * @param employeeLoginDTO 登录参数
     * @return 员工实体

    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String inputPassword = employeeLoginDTO.getPassword();

        // 1. 根据用户名查询数据库
        Employee employee = employeeMapper.getByUsername(username);

        // 2. 处理异常情况
        if (employee == null) {
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        // 3. 管理员特殊处理逻辑
        if ("admin".equalsIgnoreCase(username)) {
            // 直接比对明文密码
            if (!inputPassword.equals(employee.getPassword())) {
                throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
            }
        } else {
            // 普通员工进行MD5加密验证
            String encryptedPassword = DigestUtils.md5DigestAsHex(inputPassword.getBytes());
            if (!encryptedPassword.equals(employee.getPassword())) {
                throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
            }
        }

        // 4. 检查账号状态
        if (employee.getStatus() == StatusConstant.DISABLE) {
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        // 5. 返回员工信息
        return employee;
    }
     */


    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO,employee);
        //设置账号状态，1表示正常状态，0表示锁定状态
        employee.setStatus(StatusConstant.ENABLE);
        //设置密码，默认密码为123456，需要进行md5加密处理
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
     /*   //设置当前记录的创建时间和修改时间
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        //设置创建人id和修改人id
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());*/

        employeeMapper.insert(employee);//插入数据
    }
    /**
     * 分页查询
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //开始分页
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        //执行查询
        Page<Employee> employees = employeeMapper.pageQuery(employeePageQueryDTO);
        //返回结果
        return new PageResult(employees.getTotal(),employees.getResult());
    }
    /**
     * 启用禁用员工账号
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {

        Employee employee = Employee.builder()
                .status(status)
                .id(id)
                .build();
        employeeMapper.update(employee);
    }
    /**
     * 根据id查询员工
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        log.info("根据id查询员工:{}", id);
       Employee employee = employeeMapper.getById(id);
       employee.setPassword("******");
       return employee;
    }
    /**
     * 编辑员工信息
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
       /* employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());*/
        employeeMapper.update(employee);
    }
}
